Method of manufacturing dies for producing perforated patterns



(No Model.)

B. B. COBB.

METHOD 0F MANUFACTURING DIES -FOR PRODUGING PERPORATED PATTERNS.

Patented Aug. 3, 1886.

j UNITED"1 S'ATES PATENT OFFICE.

HENBY B. ooBB, or WILMINGTON, DELAWARE.

i METHOD 0F MANUFACTURING DIES FOR PRODUCING PERFORATED PATTERNS.

vSESPlElCII:"I(LA1ION form-ing part of Letters Patent No. 346,580, dated August 3,1886.

Application filed June 20, 1885.

To @ZZ wtont it may concern.:

Be it known that I, HENRY B. Conn, a citi- .zen of the United States, residing at Vilming ton, inthe county of New Castle and State of IDeIaWare, have invented a certain new and Improved Method vof ManufaeturingJDies Afor Producing Perforated Patterns; `and I hereby declare the following to be a full, clear, and exact description of thev time..

My invention relates partietdarl y to the manufactureof dies for patterns of the nature of those which are prepared for the stamping with designs of material to be embellished with embroidery, upon which the designs of the pattern are transferred by painting over the latter, whereby the paint becomes deposited upon the material in dots through 'the numerous minute p'erforations forming the configurations upon the pattern-sheet. Hitherto the manufacture .of these pattern-sheets has entailed a laborious operation that requires considerable time to perform, and permits at the most but a few patterns to be made at one such operation. These causes render the production of thisarticle expensive; and it is my object toovercome the causes which are productive of disproportionate expense in the manufacture by providing dies from which to take the patterns by impression, in a manner similar to the proceeding of printing on a press, and formed by the method constituting` my invention, which consists, 2 5Sentally, in inserting` pins into a readily-pepetrable substance to cause them to form a design, and setting the pins in their adjusted positions by embeddingth ein toward their exposed extremities in a suitable substance in a plastic state,

which becomes hard by exposure.

My invention also consists in certain steps forming details in the manner of procedure.

Referring to the drawings, Figure lis a plan View of a die for producing perforated patterns formed according to my improved' method; Fig. 2, a sectional View showing the points of the pins inserted into a soft-wood board, which forms one step in the manufacture of the die, and Fig. 3 a sectional View of the same, showing, in elevation, the pins employed to produce the design set into a retaining substance.

MA A are headless pins of uniform size, the

Sin-iai No. 170,103. (No monti.)

points, '1, of which are driven to an equal depth-asuitable instrument being employed to gage the depth of penetratioli-preferably into a board el" soft wood, ll. The surface of the board is, by preference, provided with a design, the lines of which arelollowed in'driving the pins, though it is thought an expert designer may be capable of forming his design upon the surface originally with the pins. Tnstead of using soft wood for the p urpose, other substance-such as thick paper-may be einployed.

Vhen the pins are adjusted at their points in the manner just described,a suitable cement, or plaster-of-paris, or molten metal-such as lead-is applied tothe surface, prefcrabl y conilued by a suitable frame surrounding the design, aud embeds the exposed portions of the pins, which, when the embedding substance becomes hard by exposure, are set within the bed-plate; andthe die thus formed is removed from the surface penetrated by the points of the pins, and is thus rendered ready for use, preferably in a press, in which the design on the die is most readily and rapidly transferred to sheets of paper, which are perforated by the projecting pinpoints -formiug the design. The extent ot' projection of the points may be regulated in driving the pins to form the die, to perforate only one sheet at a time without injuring the pin-points in transferring the desheets penetrated by the pin-points and operating to reduce the extent of projection oi' the latter sufficiently to adapt the device to its work without danger of injury to the parts.

If desired, the substance into which the pins are first inserted to form the design may be Vsoft rubber, when it is not necessary that they shall pen etrate entirely through the substance, since the pressure brought to bear upon'the die in using it will cause thepoints to penetrate and puncture the sheet or sheets in the operation 'of pattern-making. This or an analogous substance, therefore, when used, of course renders unnecessary the last step of the methodi. e.,

he removal of the pins from contact with the substance penetrated by them.

If molten metal is used to form the bed which serves to set the pins, the surface into which the points are inserted should be coated with some non-combustible material-such as asbestus-cithcr in thc form of paint or a paper sheet.

Vhat I claim as new, and desire to secure by Letters Patent, is

l. The herein-described method of forming dies for making perforated patterns, which consists in inserting pins into a readily-penetrable substance to form a design, and setting the pins in their adjusted positions by embedding them toward their exposed ends in a suitable substance in a plastic state, which hardens on exposure, substantially as described.

2. The herein-described method of forming" dies for perforated patterns, which consists '1n inserting the points of pins a predetermined distance into a soft substance to form a design with the pins, setting the pins in their aldjusted positions by embedding them toward their exposed extremities in a suitable substance in a plastic state, whichhardens on ex posure, and removing the points of the pins When firmly set from contact with the soft substance penetrated by them, substantially as described.

HENRY COBB..

In presence of EDWARD THoRrE, MASON BRoss. 

